Correct the error text of Validators::gt()

Author: ZhangChengLin

src/Locale/LocaleZhCN.php

@@ -64,7 +64,7 @@ class LocaleZhCN
         'max'      => '{attr} maximum boundary is {value0}',
         'lt'       => '{attr} value must be less than {value0}',
         'lte'      => '{attr} value must be less than or equals to {value0}',
-        'gt'       => '{attr} value must be greater than or equals to {value0}',
+        'gt'       => '{attr} value must be greater than {value0}',
         'gte'      => '{attr} value must be greater than or equals to {value0}',
 
         // field compare

src/Validator/GlobalMessage.php

@@ -61,7 +61,7 @@ final class GlobalMessage
         'max'      => '{attr} maximum boundary is {value0}',
         'lt'       => '{attr} value must be less than {value0}',
         'lte'      => '{attr} value must be less than or equals to {value0}',
-        'gt'       => '{attr} value must be greater than or equals to {value0}',
+        'gt'       => '{attr} value must be greater than {value0}',
         'gte'      => '{attr} value must be greater than or equals to {value0}',
 
         // field compare